A student carried out an experiment to investigate the rate of reaction between powdered calcium carbonate and excess dilute hydrochloric acid, using the following apparatus. (a) The student measured the mass of the flask and contents every 30 seconds and calculated the loss in mass. time (min) loss of mass (g) 0.0 0.00 0.5 0.60 1.0 1.05 1.5 1.45 2.0 1.75 2.5 1.95 3.0 2.10 3.5 2.20 4.0 2.25 4.5 2.30 5.0 2.30 Explain why there is a loss in mass.(2) loose plug of cotton wool dilute hydrochloric acid powdered calcium carbonate balance 15 (b) Draw a graph of these results on the grid

Explanation is in the file

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both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

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i think its 5049.

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